class_docstr: A stream operator for aggregating a rolling window of a stream.
  
  Parameters
  ----------
  func : `Callable[[List[float]], float]`
      A function that aggregates a rolling window.
code: def reset(self) -> None:
      self.n = 0
      super().reset()
  
imports: from typing import List, Callable
  import numpy
  from tensortrade.feed.core.base import Stream
  from tensortrade.feed.api.float import Float
label_desc: Use image node_id 4 for calling the RollingNode obj's underlying member method code with example usage: obj.reset() without return types